BRAINSTORM,VOODOO AND PP

hi out there,where ever you are.im pretty new to gardening having only harvested 8 plants. my first grow produced better results than my second grow. and on my first grow i had cheaper equipment.so im going back to basics..germinated 12 seeds last week(7 voodoo,2 brainstorm,and a power plant) and they all popped within two days.i had all the voodoo left over from a plant that turned hermie,so it will be intresting to see if they grow... any advice from any one on ph would be welcome.i have been feeding my latest grow with ph 6 water/fert and i have not noticed a big improvment in my buds.... ill get some pics up as soon as they break through..happy growing